linux-kernel - [PATCH 6/9] spi: axi-spi-engine: implement xfer->cs_change

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Message-ID: <20231204-axi-spi-engine-series-2-v1-6-063672323fce@baylibre.com>
Date:   Mon,  4 Dec 2023 11:33:32 -0600
From:   David Lechner <dlechner@...libre.com>
To:     linux-spi@...r.kernel.org
Cc:     David Lechner <dlechner@...libre.com>,
        Mark Brown <broonie@...nel.org>,
        Michael Hennerich <michael.hennerich@...log.com>,
        Nuno Sá <nuno.sa@...log.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 6/9] spi: axi-spi-engine: implement xfer->cs_change_delay

This adds handling of xfer->cs_change_delay to the AXI SPI Engine
driver.

Signed-off-by: David Lechner <dlechner@...libre.com>
---
 drivers/spi/spi-axi-spi-engine.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c
index 84ec37732d8b..3437829ef8b1 100644
--- a/drivers/spi/spi-axi-spi-engine.c
+++ b/drivers/spi/spi-axi-spi-engine.c
@@ -265,6 +265,10 @@ static void spi_engine_compile_message(struct spi_message *msg, bool dry,
 				if (!xfer->cs_off)
 					spi_engine_gen_cs(p, dry, spi, false);
 
+				spi_engine_gen_sleep(p, dry, spi_delay_to_ns(
+					&xfer->cs_change_delay, xfer),
+					xfer->effective_speed_hz);
+
 				if (!list_next_entry(xfer, transfer_list)->cs_off)
 					spi_engine_gen_cs(p, dry, spi, true);
 			}

-- 
2.43.0